10122020021 has 16 divisors (see below), whose sum is σ = 10669929600. Its totient is φ = 9583282368.

The previous prime is 10122019993. The next prime is 10122020039. The reversal of 10122020021 is 12002022101.

It is a happy number.

10122020021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10122020021 - 2¹⁴ = 10122003637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10122019984 and 10122020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122020071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3957275 + ... + 3959831.

It is an arithmetic number, because the mean of its divisors is an integer number (666870600).

Almost surely, 2^10122020021 is an apocalyptic number.

It is an amenable number.

10122020021 is a deficient number, since it is larger than the sum of its proper divisors (547909579).

10122020021 is a wasteful number, since it uses less digits than its factorization.

10122020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10122020021 its reverse (12002022101), we get a palindrome (22124042122).

The spelling of 10122020021 in words is "ten billion, one hundred twenty-two million, twenty thousand, twenty-one".